Data compression and decompression method between digital unit and radio unit in cloud radio access network

摘要

A method of compressing In-phase/Quadrature (I/Q) data transmitted and received between a Digital Unit (DU) and a Radio Unit (RU) in a Cloud Radio Access Network (CRAN) structure is disclosed. The method includes (a) calculating a minimum value D i MSB among meaningless higher-order bit digits D MSB i , j with respect to each of j-th I/Q samples having a predetermined resolution among i-th unit blocks that are units of compression, and (b) transmitting each of the samples after each of the samples is converted into a binary number and D i MSB number of higher-order bits, excluding a sign bit, are removed.